Motor-sleigh.



L. M. LINDAL.

MOTOR SLEIGH. APPLICATION FILED MAR. 11, 1914.

Patented Sept. 15,1914.

2 SHEETS-SHEET 1- un [Mensa L. M. LINDAL.

MOTOR SLEIGH. APPLICATION FILED MAR.17,1914.

1,1 10,949. Patented Sept. 15, 1914.

2 SHEETS-SHEET 2- Mfi A l l 5/ Linda s'rans aran ,floa. v

turner. MELANKTON LINDAL, or care, menarche, oannna.

noroastnien.

narrates.

Specification of Letters Patent.

Patented Sept. 15, 19M.

apparition filed March 11, 1914. aerial no. seaaaa driven by an internal combustion engine and which is of such construction as to prevent the lateral skidding of the machine either at the front or rear, while enabling said machine to be carefully and accurately directed or steered.

A further object of the invention is to so mount the actuating propellers as to prevent injury thereto when the machine strikes an obstacle also to provide means to give greater or less traction to the propellers in accordance with the depth of the snow or nature of the surface over which the machine is traveling. j

'With the above andother objects in view,

the invention consists in the novel construe- ..tion, combination and arrangement of parts, as will hereinafter be more fully described, illustrated and claimed.

In the accompanyin drawings :'-Figvure 1 is a side elevation of a motor sleigh embodying the present invention. Fig. 2 is a rear elevation of the same. Fig. 3 is a plan View thereof. Fig. 4 is a vertical cross section on the line 4-4 of Fig. 1.

The sleigh contemplated in this invention comprises in the preferred embodiment thereof a platform 1 which preferably extends throughout ,practically the entire length of the sleigh and has mounted thereon, preferably near the front of the machine,

an internal combustion engine which is conventionally. shown at 2. Mounted to turn on a vertical axis under the front portion of the platform is a front bob-sled comprising parallel runners 3 and arms 4 connected by a cross bar 5 on which is rigidly secured a bevel gear wheel 6. Located above thegear wheel 6 is a stationary disk or plate 7 which is bolted or otherwise fastened as shown at 8 to the bottom of the platform 1 preferably just beneath the engine 2. A central king bolt 9 connects the bob-sled with the platform and admits of the turning movement of said bobsled for steering purposes.

Y Meshing with the bevel gear wheel '3 is a bevel pinion 10 fast on the forward end of a steering shaft 11 provided with a control wheel 12 adjacent to the operationsv seat on the platform l.

Arranged below the platform and in rear of the engine2 are parallel horizontally ex tending spiral bladed propellers 13. These may be of any suitable length in accordance with thetotal len h of the motor sleigh and the shafts 14 of sald propellers are journaled in brackets or hangers 15 extendingdownwardly from and adjacent to the rear end of the platform 1. ,The forward ends of the propeller shafts 14 are journaled in vertically movable bearings 16 having upwardly extending guide stems or rods 17 whlch work through openings 18 in the Coiled expansion springs 19 encircle said bolts 17 a ove the bearings 16 and beneath the platform 1 thereby permitting the for: ward ends of the propellers to yield upwardly upon striking a hard obstruction. On the forward extremities of-the propeller shafts 14 are sprocket wheels 20 from which chains 21 extend around sprocket wheels 22 and 23 one ofwhich is onthe engine shaft and the other on the shaft parallel to the shaft of the engine as shown in Fig. 4:. At

the rear end of the motor sleigh are rearwardly projecting parallel runners 24 which are V-shaped in cross section so as to provide a longitudinal cutting edge or rib 25 which will prevent lateral skidding of the machine. The front runners 3 are formed in the same manner and for the same purpose. The rear runners 24 are mounted yieldingly on the rear extremities of a pair of supporting springs 26- and said runners are pressed downwardly by means of coiled expansion tendingl from the runners 24. upwardly throug holes in a pair of depressing arms 29 extending rearwardly from a common .rock shaft 30 journaled in hearings on or near the rear end of the platform 1. An operating arm 31 extends from the shaft 30 and has jointed thereto a connecting rod 32 platform springs 27 which encircle guide rods 28 exwhich is actuated by athumb latch lever 33 working in connection with a or rack 34 on the platform 1.

By means of thelever 33 the operator may depress the rear runners 24s to any desired extent to afford the proper support for the notched sector propellers 13 and remove the weight from said propellers while allowing" them to ob tain the necessary tractive hold on the snow to each other at opposite sides of or other surface over which the sled is being propelled. In addition to this precaution, the forward extremities of the propellers are adapted to yield upwardly upon coming in contact with any hard obstruction such as a log or stone.

What I claim is'.'--

A motor sleigh comprising a platform, an engine mounted thereon, a plurality of spiral blade propellers arranged in spaced relation of the platform and beneath the latter, said propellers revolving on horizontal axes, shafts for said propellers geared to and driven by the engine shaft, runners supporteircling said-rods and serving the center ing the forward end of said. platform, runners supporting the rear end of said platform, a manually controlled rock shaft adj acent to the rear end of said platform, arms on said rock shaft, thrust rods extending upwardly from the rear runners througn said arms, and coiled expansion springs endepress said rear runners.

In testimony whereof I al'fiz my signature in presence of two Witnesses.

LUTHER MELANKTQN LINDAL,

Witnesses;

SAMUEL J. SAMsoN, FLORENCE E. BARBER.

to yielding-1y 

